Patricio O’Ward, who won the Indy Lights championship last season, and Colton Herta, O'Ward's runner-up, will use Honda's 2.2-liter, twin-turbocharged, V-6 engines even though Harding Racing had used Chevrolet engines the past two seasons.

"Harding Steinbrenner Racing is very appreciative of our relationship with Chevrolet in 2017 and 2018,” team president Brian Barnhart said in a release. “However, our direction as a race team closely aligns with Honda for the near future. Therefore, we will be making a change."

The Firestone Grand Prix of St. Petersburg starts the 2019 season on March 10.